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(No Model.)

B. W. TRAYLOR.

ELECTRIC MOTOR.

No. 447,704. Patented Mar. 3,1891.

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UNITED STATES PATENT OFFICE.

ROBERT IV. TRAYLOR, OF RICHMOND, VIRGINIA, ASSIGNOR TO THE TRAYLORELECTRIC COMPANY, OF SAME PLACE.

ELECTRIC MOTOR.

SPECIFICATION forming part of Letters Patent No. 447,704, dated March 3,1891.

Application tea a, 21, 1890.

To all whom it may concern:

Be it known that 1, ROBERT X TRAYLOR, a citizen of the United States,residing at Richmond, in the county of Henrieo and State of Virginia,have invented new and useful Improvements in Electric Motors, of whichthe following is a specification.

My invention relates to certain improvements in the construction ofelectrical motors, the purpose thereof being to provide a motor capableof running upon curves and elsewhere without injury, which shall becompact and durable and produce the maximum mechanical and magneticeffects.

It is also one purpose of my invention to provide a simple andeconomical construction and arrangement of parts whereby anyfield-magnet core may be renewed by simply removing a bolt and withoutthe necessity of removing the entire motor from the car.

It is mypurpose, finally, to provide a fieldmagnet in which the severalcoils of wire are each wound upon a separate core. In certain motors thecoils are overlaid or combined on one core, the consequence being thatifthe bottom coil burns out theinclosing coils must be removed before theburned coil can be renewed, causing a considerable expenditure of timeand labor. As already set forth, itis my object to avoid theseobjections and to provide a novel and simple construction whereby anequal amount of work is accomplished with a smaller quantity of currentthan has heretofore been possible by providing separate cores to producehigher magnetism in having wire wound closer.

To these ends my invention consists in the several novel features ofconstruction and new combinations of parts hereinafter fully described,and then pointed out in the claims following this specification.

Referring to the accompanying drawings, Figure l is a partial plan view,showing a motor connected with a car and having my invention embodiedtherein. Fig. 2 is a transverse section upon the line a; m, Fig. 1.

In the said drawings, the reference n umeral l designates part of theframe of the motor, which is constructed substantially shown andsupported by j ournal-boxcs 2 in the wellknown way.

erial No. 352,589 (No model) The numeral 3 denotes the yokes for thefieldmagnets and poles, which consist of plates forming the supports forthe magnet and for the pole-pieces thereof. Between these yokes and theparallel projections r on the pole-pieces are interposed three cores 5,which are preferably arrangedinatriangular group or at the angles of atriangle. Each of these cores is supported by a bolt 6, passing throughthe core '7 of the magnet and through the yoke, as well as through theprojection 4: parallel with the yoke upon the same side of thetransverse center of the polepieces, nuts 8 being turned upon one orboth ends of the said bolts. This arrangement of the cores gives a broadand firm base of support upon the yokes and upon the projections 4:parallel therewith, whereby a firm attachment is provided ofgreatstrength, which will rigidly resist the wrenching and twisting of theframe as the car passes around curves.

Each of the cores 7 of the magnets is wound with one of the coils of thefield-magnet. The armature-shaft 9 rotates in bearings 10, supported inor upon the yokes 3. The armature is provided with commutator-segments12 of any desired construction, which make contact with brushes 13,supported by bearings 14:, mounted in or upon the yokes 3. The shaft 15of the armature 9 is mounted at substantially equal distances from thefour cores, which, as shown in Fig. 2, are mounted upon the ends of theparts 3 adjacent to the armature. Between the three cores nearest 8 thecar-axle and through the pole a shaft '16 is inserted, its ends passingthrough the yokes 3 and carrying upon one end a gear 17, which mesheswith a smaller pinion 18 upon the pro jecting end of the armature-shaft15. Upon the other end of the intermediate shaft 16 is mounted a smallpinion 19, which meshes with the gear 20 upon the axle of the car.

13y arranging the coils feeding the magnetic field in the mannerdescribed I not only provide a triple connection between the yokes andthe parallel projections upon the ends of the shoes, but I also enableany repairs to be made to the magnets in the easiest, simplest,and mostexpeditiousmanner. Ialso I provide a motor which is capable ofperforming the samedegree of work witha materially less quantity ofcurrent. For example, in motors where all overlying coils are wound uponone and the same core about ten amperes are required in the lower coilto satu- 5 rate the core, while twenty amperes are needed for a thirdcoil and fifteen or thereabout for the middle coil. In my invention,however, ten amperes for each coil or thereabout are sufficient for eachof the coils, giving a higher percentage of induction with a lesscurrent.

It will be understood that these magnets feeding the field may beconnected either in shunt or series winding.

.lVhat I'claim is- 1. In an electric motor, the combination, with thepole-pieces of the field-magnet, of cores arranged between the yokes andthe parallel projections of the pole-pieces, each magnet being woundwith a separate coil, and a counter-shaftextending between and parallelwith the cores of said magnets, substantially as described.

2. In an electric motor, the combination, with the yokes and theparallel projections supporting the pole-pieces, of cores having atriangular arrangement between the said projections and the yokes andunited thereto by bolts and nuts, whereby an extended base of supportand attachment is afforded between said parts, substantiallyasdescribed.

3. In an electric motor, the combination, with the pole-pieces of thefield-magnet, havinglateralprojections and provided with yokes paralleltherewith, of cores each carrying a 3 5 separate coil and each arrangedbetween the said yokes and parallel projections, bolts passing throughthe cores of said magnet and pro ecting at their ends through the saidyokes and projections, and nuts turned upon the said projecting ends,substantially as described.

4. In an electric motor, the combination, with the pole-pieces of afield-magnet, of three separate cores having their cores arranged uponeach keeper at the apices of a triangle, each core being wound with aseparate coil, an armature having its shaft arranged in substantialparallelism with and at equal distances from the cores of the four coresadjacent to the said armature, and a counter-shaft arranged between thethree cores upon one side of said armature and provided with a pinionmeshing with a gear on the car-axle and at the other end with a largegear meshing with a small pinion upon the shaft of the armature,substantially as described.

5. In an electric motor for cars and similar vehicles, the combination,with an armatureshaft, of pole-pieces having lateral projections, coresarranged in triangular groups of three upon each side of said armature,each core being wound with a separate coil and being secured between thelateral projections of the pole-pieces and yokes parallel there- I withby means of boltspassing through both and secured by nuts, and acounter-shaft parallel with and intermediate of the cores of one of thetriangular groups of cores and carrying a gear and a pinion meshing,respectively, with a gear on the axle and a pinion on the armature-shatt, substantially as described.

6. In an electric motor, a field-magnet having its coils separated intogroups of three, each wound on a separate core and having substantiallytriangular arrangement on 0p- 7 5 posite sides of the armature, theterminals of each coil being connected to the corresponding coil in theopposite group, and said circuits being connected in shuntor series,substantially as described.

In testimony whereof I have affixed my signature in presence of twoWitnesses.

ROBERT IV. TRAYLOR.

Witnesses:

JAMES L. NORRIS, JAMES A. RUTHERFORD.

